10
P. Senthil Kumar and G. Janet Joshiba
as strength, strength to weight ration, mechanical properties, and other defiances are
enhanced in the polyester materials [10]. The polyesters are well known for their
unique properties such as:
• Amorphous structure
• High strength
• High heat resistance
• Flame retardancy
• Dimensional stability
• High impact resistance
• Wear resistance
• Abrasion resistance
• Acoustics absorption
• High tensile strength
• Thermal insulation
• High mechanical strength
• Chemical resistance
• Resistance against UV radiation.
The recycled polyesters are seemed to possess unique outstanding mechanical,
thermal insulation, tensile properties, wear resistance, tear resistance, etc., Several
studies have been carried out on the properties of the recycled polyesters. The recycled polyesters are represented by some of its characteristics such as color, viscosity,
molecular weight, functional groups and thermal properties [8]. The various outstanding properties of the recycled polyesters are explained in this chapter elaborately.
7.1 Physical Properties
The recycled polyesters have remarkable physical properties such as bending length,
moisture regain, abrasion resistance, tenacity and crease recovery angle. The recycled
polyesters possess enhanced moisture regaining capacity than the virgin polyesters
because of the significant molecular arrangement. The virgin polyesters possess
higher bending length when compared to the recycled polyesters because of the
lessened crystallinity in the recycled polyesters. In addition, the higher tenacity
also enhances the mechanical strength of the recycled polyesters (www.textilemates.
com). The results of the physical and molecular examination concluded that the virgin
polyesters are not same as the recycled polyesters. The virgin polyesters seemed to
possess higher molecular weights, higher viscosity and less melt flow index whereas
the recycled polyesters possess less molecular weight, less viscosity because of the
impact of higher temperature and shear caused during the recycling process of the
PET.
P. Senthil Kumar and G. Janet Joshiba
as strength, strength to weight ration, mechanical properties, and other defiances are
enhanced in the polyester materials [10]. The polyesters are well known for their
unique properties such as:
• Amorphous structure
• High strength
• High heat resistance
• Flame retardancy
• Dimensional stability
• High impact resistance
• Wear resistance
• Abrasion resistance
• Acoustics absorption
• High tensile strength
• Thermal insulation
• High mechanical strength
• Chemical resistance
• Resistance against UV radiation.
The recycled polyesters are seemed to possess unique outstanding mechanical,
thermal insulation, tensile properties, wear resistance, tear resistance, etc., Several
studies have been carried out on the properties of the recycled polyesters. The recycled polyesters are represented by some of its characteristics such as color, viscosity,
molecular weight, functional groups and thermal properties [8]. The various outstanding properties of the recycled polyesters are explained in this chapter elaborately.
7.1 Physical Properties
The recycled polyesters have remarkable physical properties such as bending length,
moisture regain, abrasion resistance, tenacity and crease recovery angle. The recycled
polyesters possess enhanced moisture regaining capacity than the virgin polyesters
because of the significant molecular arrangement. The virgin polyesters possess
higher bending length when compared to the recycled polyesters because of the
lessened crystallinity in the recycled polyesters. In addition, the higher tenacity
also enhances the mechanical strength of the recycled polyesters (www.textilemates.
com). The results of the physical and molecular examination concluded that the virgin
polyesters are not same as the recycled polyesters. The virgin polyesters seemed to
possess higher molecular weights, higher viscosity and less melt flow index whereas
the recycled polyesters possess less molecular weight, less viscosity because of the
impact of higher temperature and shear caused during the recycling process of the
PET.